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“The 4% rule assumes that spending will be the same in retirement. But 50% of the couples will have one spouse that dies by the age of 80. What are the chances that one spouse will spend as much as two? Not much, and our ability to spend diminishes with age.

Finke also noted that the static 4% rule not only performed worse than a more dynamic rule that took current events into consideration, it also performed worse that “a regular RMD payment.”

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